/Engine/Source/Editor/UnrealEd/Public/ActorGroupingUtils.h
Creates a new group from the provided list of actors removing the actors from any existing groups they are already in
virtual [AGroupActor](API\Editor\UnrealEd\Editor\AGroupActor) * GroupActors ( const [TArray](API\Runtime\Core\Containers\TArray)< [AActor](API\Runtime\Engine\GameFramework\AActor) * > & ActorsToGroup )